CN111430968A - Spring hole without inner sleeve wire and assembling method thereof - Google Patents

Abstract

The invention relates to a wire spring hole without inner sleeve and an assembling method thereof. The wire spring hole without inner sleeve includes a front sheath, and the front end is a plug end for inserting the matched pin; the wire spring forms a hyperboloid structure for mating with the pin, and the front end of the wire spring is connected to the front guard The front end of the sleeve is fixedly connected; it also includes a rear end sleeve, the front end is distributed with a plurality of limit grooves along the circumferential direction, and each limit groove extends forward and backward; the front end of the end connection sleeve is inserted and assembled in the front sheath, the wire The spring wires are positioned and inserted in the limiting grooves in one-to-one correspondence. When the rear sleeve and the front sheath are connected to a relative rotation setting angle and fixedly assembled together, the front end and rear end of the wire spring wire are circumferentially displaced. Hyperboloid structure; the rear end of the terminating rear sleeve is provided with a terminating structure for connecting to the corresponding circuit. Compared with the non-inner sleeve wire spring hole in the present invention, there is no need to set a transition mandrel, and the axial length of the entire wire spring hole can be relatively shortened, which is beneficial to the high-precision integration of products develop.

Description

Wire spring hole without inner sleeve and its assembly method

technical field

The invention relates to a wire spring hole without inner sleeve and an assembling method thereof.

Background technique

The mating of the contacts of the electrical connector is mating mating of the male contacts and the female contacts. The male contact is also called the pin (Pin), which is generally a rigid part. The female contact is also called a socket, which is generally an elastic contact and is also the key to insertion. The elastic structure of the jack is elastically deformed when it is inserted into the rigid pin to generate an elastic force. The elastic force makes the elastic structure form a close contact with the rigid pin to complete the current and signal connection. The electrical connector contacts are directly related to the current and The quality of signal transmission.

Common jacks include wire spring holes (also called wire spring jacks). One of the structures without inner sleeve wire spring holes is as follows: As shown in Figure 1, the inner sleeveless wire spring holes include front sheath 21, wire spring The wire 22 , the transition mandrel 23 and the rear end sleeve (not shown in the figure) are connected, and the front end of the front sheath 21 is bent inward to form a U-shaped groove 24 . The length of the transition mandrel 23 is matched with the axial length of the front sheath 21, and, in order to facilitate the feeding of the wire spring, an axially extending accommodating groove 25 is distributed on the outer peripheral surface of the transition mandrel 23, and the wire spring 22 They are respectively arranged in each accommodating groove 25 and protrude from the front end face of the transition mandrel 23 .

When assembling, insert the transition mandrel 23 forward into the front sheath 21 and insert the part of the wire spring wire 22 extending out of the transition mandrel 23 into the U-shaped groove 24, and radially crimp the groove wall of the U-shaped groove or The front end of the spring wire 22 is fixed to the front sheath 21 by welding the front sheath 21 and the front end of the spring wire 22 . Then, the transition mandrel 23 is pulled back so that the front end of the transition mandrel 23 corresponds to the rear end of the front sheath 21 . Rotate the transition mandrel 23 to make the coil spring wire 22 form a hyperboloid three-dimensional structure, and crimp the rear end of the front sheath 21 radially inward, so that the front sheath 21 and the transition mandrel 23 are axially positioned to complete the inner Assembly of socket spring holes.

The smallest radial dimension of the hyperboloid three-dimensional structure enclosed by the wire spring wire 22 is called the throat circle, and the diameter of the throat circle is smaller than the diameter of the pin. Open, relying on the elastic force of the wire spring wire 22 to achieve close contact between the wire spring wire 22 and the pin. The rear end of the transition mandrel 23 is connected to the rear end sleeve, which is used to connect to the corresponding line.

The inner sleeveless wire spring hole does not need to be provided with an inner sleeve, so that the radial dimension of the inner sleeveless wire spring hole is small. However, there is a transition mandrel, and in order to ensure the smooth feeding of the wire spring wire into the front sleeve, the length of the transition mandrel needs to be set longer to match the length of the front sheath, resulting in a longer axial length of the entire wire spring hole without inner sleeve. It is not conducive to the development of high-precision integration of products.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a wire spring hole without inner sleeve, which is used to solve the problem of the long axial length of the existing wire spring hole without inner sleeve, which is not conducive to the development of high-precision integration of products. Another purpose of the present invention is The purpose is to provide an assembly method without an inner sleeve wire spring hole, so that the axial length of the inner sleeve wire spring hole is relatively short.

In order to achieve the above-mentioned purpose, the technical scheme without inner sleeve wire spring hole provided by the present invention is: no inner sleeve wire spring hole, including:

Front sheath, the front end is a plug end for the insertion of the matching pins;

a wire spring wire, which forms a hyperboloid structure for mating with the pin, and the front end of the wire spring wire is fixedly connected with the front end of the front sheath;

The rear sleeve is terminated, and the front end of the termination rear sleeve is distributed with a plurality of limit grooves along the circumferential direction, and each limit groove extends along the front and rear;

The front end of the rear end sleeve is inserted and assembled in the front sheath, and the wire spring wires are positioned and inserted into the limit grooves in a one-to-one correspondence. When the relative rotation sets the angle and is fixedly assembled together, the front end and the rear end of the wire spring wire are circumferentially displaced to form the hyperboloid structure;

The rear end of the terminating rear sleeve is provided with a terminating structure for connecting to a corresponding line.

The beneficial effect is as follows: the front end of the wire spring wire is fixed on the front end of the front sheath, the rear end sleeve is inserted into the front sheath, and during the insertion process, the wire spring wire enters the limit groove of the rear end sleeve correspondingly one by one , the rear end sleeve and the front sheath are relatively rotated to set an angle in the circumferential direction of the rear end sleeve, so that the wire spring wire is rotated to form a hyperboloid structure, and then the front end of the rear end sleeve is connected with the rear end of the front sheath. The ends are fixedly connected, the assembly without the inner sleeve wire spring hole is completed, and the rear end of the rear end sleeve is provided with a termination structure for connecting to the corresponding circuit. The wire spring hole without inner sleeve of the present invention is compared with the wire spring hole without inner sleeve in the prior art, and uses the rear sleeve to realize the rotation of the wire spring wire, and it is not necessary to set up a transition mandrel to connect the front sheath and the end connection. The rear sleeve is directly fixed and assembled together, which can relatively shorten the axial length of the entire wire spring hole, which is conducive to the development of high-precision integration of products.

As a further improvement, the notch at the front end of the limiting slot is a flared structure for guiding the wire spring wire to be inserted into the limiting slot.

The advantage is that when the rear end sleeve is inserted into the front sheath from the back to the front, it is convenient for the guide wire spring wire to enter the limiting groove and the assembly of the wire spring hole is convenient.

As a further improvement, the front end of the rear end sleeve has a tapered section, and the notch of the limiting groove extends to the tapered section.

The advantages are that it is easy to process, and the tapered section can also guide the wire spring wire into the limiting groove.

As a further improvement, the rear end sleeve, the wire spring wire and the front sheath are radially crimped and fixedly assembled.

The advantage is that the crimping technology is mature, which is convenient for simplifying the assembly process of the wire spring hole without inner sleeve.

As a further improvement, the part of the wire spring wire inserted into the corresponding limiting groove is fixed by the radial pressure contact of the front sheath, so as to realize the radial compression of the termination rear casing, the wire spring wire and the front sheath Connect to fixed assembly.

The advantage is that the fixed assembly of the rear end sleeve, the wire spring wire and the front sheath is realized by radial crimping by using the existing limit grooves on the rear end sleeve, which is convenient for assembly.

As a further improvement, the limiting groove is formed by milling, and the rear end sleeve is provided with an undercut groove on the rear side of the limiting groove.

As a further improvement, an annular stop step is provided on the outer periphery of the rear end sleeve, and the rear end of the front sheath is stopped and matched with the annular stop platform.

The advantage is that it can indicate the relative axial position of the front sheath and the rear sheath, so that the operator can easily judge whether the rear sheath and the front sheath are inserted in place.

In order to achieve the above purpose, the technical solution of the assembling method without inner sleeve wire spring holes provided by the present invention is: the assembly method without inner sleeve wire spring holes comprises the following steps:

First, use the transition mandrel to send the wire spring wire into the front sheath, and after the wire spring wire is in place, the front end of the wire spring wire is fixedly connected with the front end of the front sheath;

2. Pull out the transition mandrel from the front sheath;

3. Insert and assemble the rear end sleeve and the front sheath, and insert the wire spring wires into the limit grooves of the rear end sleeve in a one-to-one correspondence. and all extend in the front-rear direction;

Fourth, the rear sleeve or the front sheath is rotated around its own axis, so that the front and rear ends of the wire spring wire are circumferentially displaced to form a hyperboloid structure;

Fifth, assemble the rear end sleeve, the wire spring wire and the front sheath together.

The beneficial effect is: in the assembling method of the present invention without the inner sleeve wire spring hole, after the wire spring wire is fed into the corresponding position of the front sheath and the front end is fixed, the transition mandrel is pulled out from the front sheath for no use, and after the end connection The sleeve is inserted into the front sheath, and the wire spring wires are inserted into the limit grooves of the rear sleeve in one-to-one correspondence to limit the position. The end-connected back sleeve or the front sheath rotate together to form a hyperboloid structure; the end-connected back sleeve can be directly connected to the corresponding line, eliminating the need for the transition mandrel and making the axial length of the wire spring hole without inner sleeve shorter. Conducive to the development of high-precision integration of products.

As a further improvement, in step 5, the rear end sleeve, the wire spring wire, and the front sheath are fixedly assembled by means of radial crimping.

The advantages are that the radial crimping and fixing are convenient, and the assembling method of the wire spring hole without inner sleeve can be effectively simplified.

As a further improvement, in step 1, the front end of the wire spring wire is fixedly connected to the front end of the front sheath by welding.

The advantages are: the welding connection is easy to operate, and the reliability of the fixed connection is high.

Description of drawings

Fig. 1 is the structural representation without inner sleeve wire spring hole in the prior art;

Fig. 2 is the structural representation of the specific embodiment 1 without inner sleeve wire spring hole of the present invention;

Fig. 3 is the structural representation of the rear sleeve in Fig. 2;

Fig. 4 is the left side view of Fig. 3;

In the figure: 21, front sheath, 22, wire spring, 23, transition mandrel, 24, U-shaped groove, 25, accommodating groove, 1, front sheath, 101, annular U-shaped groove, 2, wire spring Wire, 3. Termination back sleeve, 301, Front end, 302, Back end, 303, Termination structure, 304, Limit groove, 305, Relief groove, 306, Conical section, 307, Flaring structure.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention, that is, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The components of the embodiments of the invention generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

Thus, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present invention.

It should be noted that relational terms such as the terms "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any relationship between these entities or operations. any such actual relationship or sequence exists. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass non-exclusive inclusion such that a process, method, article or device comprising a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus. Without further limitation, an element defined by the statement "comprising a..." does not exclude processes, methods, and methods that include said element.

In the description of the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" that may appear should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection, It can be connected in one piece; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication between the two components. Those skilled in the art can understand the specific meanings of the above terms in the present invention through specific situations.

In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the term "provided" that may appear should be understood in a broad sense. It is arranged separately from the body and connected to the body, and the connection can be detachable or non-detachable. Those skilled in the art can understand the specific meanings of the above terms in the present invention through specific situations.

The present invention will be further described in detail below in conjunction with the embodiments.

The specific embodiment 1 of the application without inner sleeve wire spring hole:

As shown in FIG. 2 , the wire spring hole without inner sleeve includes a front sheath 1 , a wire spring wire 2 and a rear end sleeve 3 .

Wherein, the front sheath 1 has a sleeve structure as a whole, the front end of the front sheath 1 is a plug end for inserting a matching pin, and the front end of the front sheath 1 is folded inward to form an annular U-shaped groove 101 , the rear end of the front sheath 1 is used for the insertion of the rear end sleeve 3, and also for the transition mandrel to feed the wire spring.

As shown in FIGS. 3 and 4 , the rear end sleeve 3 includes a front end portion 301 and a rear end portion 302 . The axial direction of the front end portion 301 is provided with a limit groove 304 extending in the front-rear direction, and the limit groove 304 is formed by milling. , the rear end of the limiting groove 304 communicates with the undercut groove 305 . The undercut 305 is located at the junction of the front end 301 of the terminating rear sleeve 3 and the rear end 302 of the terminating rear sleeve 3. The undercut 305 includes a groove front wall, a groove rear wall and a groove bottom wall. The front end of the rear end portion 302 is formed, and the radial dimension of the rear end portion 302 of the rear end sleeve 3 is larger than that of the front end sleeve, that is, the dimension of the rear groove wall of the undercut groove 305 along the radial direction of the end connection back sleeve 3 is larger than that of the undercut groove The front groove wall of 305 is along the radial dimension of the rear sleeve 3, and the front end 301 and the rear end 302 of the rear sleeve 3 form an annular stop step.

The front end of the front end portion 301 of the terminating rear sleeve 3 is provided with a tapered section 306 , and the limiting groove 304 extends to the tapered section 306 . The front end of the limiting groove 304 forms a flared structure 307 and cooperates with the tapered section 306 to guide the wire spring wire 2 into the limiting groove 304 during the process of inserting the wire spring wire 2 into the limiting groove 304 .

The rear end portion 302 of the termination rear sleeve 3 is provided with a termination structure 303, and the termination structure 303 is used for connecting to a corresponding circuit. The termination structure 303 can be configured as a printed board, a wiring board, a soldering cup, a fisheye structure, or the like according to actual needs.

In this embodiment, there are six wire spring wires 2, which are made of conductive material and have a certain hardness. The wire spring wires in the prior art can be used for the wire spring wires. Attention should be paid to their strength and electrical conductivity to meet the requirements of the matching pins. Signal transmission requirements when plugged.

In this embodiment, the front end of the wire spring wire 2 is inserted into the annular U-shaped groove 101 at the front end of the front sheath 1 and fixed in the annular U-shaped groove 101 by radial crimping.

In fact, after the wire spring wire 2 is fed into the front sheath 1, the transition mandrel is pulled out, and then the rear end sleeve 3 is fed into the front sheath 1. At this time, the wire spring wire 2 corresponds to one another. Insert it into the limiting groove 304, and rotate the rear end sleeve 3 around its central axis to set an angle, so that the front and rear ends of the wire spring are circumferentially dislocated to form a hyperboloid structure, and the radial dimension at the smallest radial dimension of the hyperboloid structure is smaller than the corresponding The radial dimension of the pin depends on the elastic force of the wire spring wire 2 to make the wire spring wire 2 and the pin plug and match reliably.

Then, the front sheath 1 is radially crimped, and the wire spring wire 2 is crimped and fixed in the limiting groove 304, so as to realize the fixed connection of the wire spring wire 2, the front sheath 1 and the terminal rear casing 3, and at the same time, ensure the wire spring Reliable electrical contact between the wire 2 and the post-terminated sleeve 3.

It should be noted that, in this embodiment, the transition mandrel in the prior art may be adopted as the transition mandrel, but after the wire spring wire is fed into the front sheath, the transition mandrel needs to be pulled out from the front sheath.

In the wire spring hole without inner sleeve provided in this embodiment, since the limit groove is set on the rear sleeve after the termination, the wire spring can be positioned in this way, and it is convenient to rotate the rear sleeve, so that the wire spring can form a three-dimensional double Curved structure, since the rear sleeve does not need to send the wire spring wire into the front sheath, the rear sleeve can be designed to be shorter, and the length of the front sheath does not need to be matched, which can effectively reduce the entire wire without inner sleeve. The axial length of the spring bore.

In addition, it should be noted that during the rotation operation, the front sheath can be fixed, and the rear sheath can be rotated. Of course, the rear sheath can also be fixed and the front sheath can be rotated. It is sufficient to form a three-dimensional hyperboloid structure.

The specific embodiment 2 of the application without inner sleeve wire spring hole:

The difference between this embodiment and Embodiment 1 is that the front end of the limit slot is not provided with a flared structure, and the wire spring wire is mainly guided by the tapered section to enter the limit slot.

The specific embodiment 3 of the application without inner sleeve wire spring hole:

The difference between this embodiment and Embodiment 1 is that the front end of the terminating rear sleeve is not provided with a tapered section, and the flaring structure of the flaring structure has a larger flaring range to facilitate the insertion of the wire spring.

The specific embodiment 4 of the application without inner sleeve wire spring hole:

The difference between this embodiment and Embodiment 1 is that the rear sleeve and the front sheath are fixed by welding, and the welding method can be resistance welding or laser welding according to the equipment conditions, and the wire spring wire is positioned through the hole wall of the limit hole.

The specific embodiment 5 of the application without inner sleeve wire spring hole:

The difference between this embodiment and Embodiment 1 is that the front end of the wire spring wire in Embodiment 1 is fixed by the annular U-shaped groove 101 at the front end of the front sheath, and the front end of the wire spring wire is fixed by radial crimping. In this embodiment, the front end of the wire spring wire is welded and fixed on the inner wall of the front sheath, and then an inward annular flange is designed on the front end of the front sheath, and the annular flange is used to protect the wire spring wire. In the specific production, the annular flange can be made after the welding is completed, so as to facilitate the welding and fixing.

The specific embodiment 6 of the application without inner sleeve wire spring hole:

The difference between this embodiment and Embodiment 1 is that: the outer periphery of the rear end sleeve is not provided with an annular stop step, but an indicator line is provided, and the indicator line indicates that the front sheath and the rear end sleeve are inserted in place, so as to ensure that there is no inner sleeve line. The pass rate of the spring hole.

The specific embodiment 7 of the application without inner sleeve wire spring hole:

The difference between this embodiment and Embodiment 1 is that in Embodiment 1, the wire spring wire is fixed in the limiting groove of the terminating rear sleeve by means of crimping and fixing by the front sheath. In this embodiment, after the wire spring wire and the limit hole are inserted in place, the rear end of the wire spring wire is welded in the limit groove, and then the rear sleeve or the front sheath is connected to the rear sleeve or the front sheath by helical rotation around its own axis to make the wire spring wire Form a hyperboloid structure, and then weld the rear end sleeve and the front sheath to fix it.

In addition, it should be noted that first welding and then rotating, so that the welding point between the wire spring wire and the end connection sleeve is outside the front sheath before rotation, which is convenient for welding. After the rotation, the wire spring wire and the end connection The welding connection of the rear sleeve enters the front sheath, and when the front sheath and the rear sleeve are connected by welding, the interference to the welding point of the wire spring can be reduced.

The specific embodiment 1 of the assembling method without inner sleeve wire spring hole of the present application:

First, use the transition mandrel to send the wire spring wire 2 into the front sheath 1, and after the wire spring wire 2 is sent in place, the front end of the wire spring wire 2 is fixedly connected to the front end of the front sheath 1 by welding;

2. Pull out the transition mandrel from the front sheath 1;

3. Insert and assemble the rear end sleeve 3 and the front sheath 1, and insert the wire spring wires 2 into the limit grooves 304 of the rear end sleeve 3 in a one-to-one correspondence;

Fourth, rotate the rear sleeve 3 or the front sheath 1 around its own axis to set the angle, so that the front and rear ends of the wire spring wire 2 are circumferentially displaced to form a hyperboloid structure;

Fifth, the rear sleeve 3, the wire spring wire 2, and the front sheath 1 are fixedly assembled by means of radial crimping.

In the assembling method provided in this embodiment, the transition mandrel is still used to send the wire spring wire into the front sheath, which is easy to operate, and then the rear sheath or the front sheath is used to drive the set angle to form a three-dimensional hyperboloid. structure, and then assemble the front sheath, the wire spring wire and the rear end sleeve together, so as to obtain the wire spring hole without inner sleeve as shown in Figure 1.

The specific embodiment 2 of the assembling method without inner sleeve wire spring hole of the present application:

First, use the transition mandrel to send the wire spring wire into the front guard, and use the welding method to fix the front end of the wire spring wire to the front end of the front sheath after the wire spring wire is in place;

2. Pull out the transition mandrel from the front sheath;

3. Insert and assemble the rear end sleeve and the front sheath, and insert the wire spring wires into the limit grooves of the rear end sleeve in a one-to-one correspondence;

Fourth, rotate the rear sleeve or the front sheath around its own axis to set the angle, so that the front and rear ends of the wire spring wire are circumferentially dislocated to form a hyperboloid structure;

Fifth, the rear sleeve, the wire spring wire and the front sheath are fixedly connected by welding.

The difference between this embodiment and Embodiment 1 mainly lies in: the fixing method of the rear end sleeve, the wire spring wire and the front sheath in step 5.

The specific embodiment 3 of the assembling method without inner sleeve wire spring hole of the present application:

First, use the transition mandrel to send the wire spring wire into the front sheath, after the wire spring wire is in place, the front end of the wire spring wire is fixedly connected with the front end of the front sheath by welding;

2. Pull out the transition mandrel from the front sheath;

3. Insert and assemble the rear end sleeve and the front sheath, and insert the wire spring wires into the limit grooves of the rear end sleeve in one-to-one correspondence, and weld the wire spring wires in the limit grooves;

Fourth, rotate the rear sleeve or the front sheath around its own axis to set the angle, so that the front and rear ends of the wire spring wire are circumferentially dislocated to form a hyperboloid structure;

Fifth, the rear sleeve and the front sheath are fixedly connected by welding.

The main difference between this embodiment and Embodiment 1 is that after the wire spring wires are inserted into the limit grooves of the rear end sleeve one by one, the wire spring wires are first welded and fixed in the limit groove, and then the rear sleeve or the front end sleeve is rotated to be fixed. The sheath is formed to form a hyperboloid structure. Finally, the front sheath and the rear sheath are fixed by welding. In this way, the method of fixing in stages is adopted to reduce the interference of the rear end of the wire spring wire receiving the front sheath.

The specific embodiment 4 of the assembling method without inner sleeve wire spring hole of the present application:

1. The front end of the front sheath has an annular U-shaped groove, and the inner and outer groove walls of the annular U-shaped groove are clamped by the method of pressing the annular U-shaped groove radially inward to clamp the wire spring wire, so that the wire spring wire can be clamped. The front end is fixedly connected with the front end of the front sheath;

2. Pull out the transition mandrel from the front sheath;

3. Insert and assemble the rear end sleeve and the front sheath, and insert the wire spring wires into the limit grooves of the rear end sleeve 3 in one-to-one correspondence;

Fourth, rotate the rear sleeve or the front sheath around its own axis to set the angle, so that the front and rear ends of the wire spring wire are circumferentially dislocated to form a hyperboloid structure;

Fifth, the rear sleeve, the wire spring wire, and the front sheath are fixed and assembled by radial crimping.

In this embodiment, the front end of the front sheath and the front end of the wire spring wire are fixed by crimping, which is convenient to operate and does not need to introduce a welding process.

Summarizing the above, the specific embodiments 1, 2, 3, and 4 of the assembling method without inner sleeve wire spring holes of the present application, the advantageous effect of the assembly method without inner sleeve wire spring holes of the present application is: After the transition mandrel is sent to the corresponding position of the front sheath and the front end is fixed, the transition mandrel is pulled out of the front sheath and is not used, and the rear end sleeve is inserted into the front sheath, and the wire spring wires are inserted into the end connection one by one. The limit groove of the sleeve is used to limit the position, and the rear sleeve or the front sheath is rotated around the axis, so that the corresponding end of the wire spring wire rotates with the corresponding rear sleeve or the front sheath to form a hyperboloid structure; The rear sleeve can be directly connected to the corresponding line, eliminating the need for transition mandrels, making the axial length of the wire spring hole without inner sleeve shorter, which is conducive to the development of high-precision integration of products.

Finally, it should be noted that the above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the Modifications may be made to the technical solutions described in the foregoing embodiments without creative efforts, or equivalent replacements may be made to some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. No inner sleeve wire spring hole, including: Front sheath, the front end is a plug end for the insertion of the matching pins; a wire spring wire, which forms a hyperboloid structure for mating with the pin, and the front end of the wire spring wire is fixedly connected with the front end of the front sheath; It is characterized in that it also includes a rear end sleeve, the front end of the rear end sleeve is distributed with a plurality of limit grooves along the circumferential direction, and each limit groove extends along the front and rear; The front end of the rear end sleeve is inserted and assembled in the front sheath, and the wire spring wires are positioned and inserted into the limit grooves in a one-to-one correspondence. When the relative rotation sets the angle and is fixedly assembled together, the front end and the rear end of the wire spring wire are circumferentially displaced to form the hyperboloid structure; The rear end of the terminating rear sleeve is provided with a terminating structure for connecting to a corresponding line. 2 . The wire spring hole without inner sleeve according to claim 1 , wherein the notch at the front end of the limiting groove is a flared structure for guiding the wire spring wire to be inserted into the limiting groove. 3 . 3 . The wire spring hole without inner sleeve according to claim 2 , wherein the front end of the rear end sleeve has a tapered section, and the notch of the limiting groove extends to the tapered section. 4 . 4. The wire spring hole without inner sleeve according to claim 1, 2 or 3, characterized in that the end-connected rear sleeve, the wire spring wire and the front sheath are radially crimped and fixedly assembled. 5 . The wire spring hole without inner sleeve according to claim 4 , wherein the part of the wire spring wire inserted into the corresponding limit groove is fixed by radial crimping of the front sheath, so as to realize the end of the wire spring. 6 . It is connected to the radial crimping and fixed assembly of the rear sleeve, the wire spring wire and the front sheath. 6 . The wire spring hole without inner sleeve according to claim 5 , wherein the limit groove is formed by milling, and the rear sleeve is provided with an undercut on the rear side of the limit groove. 7 . . 7. The wire spring hole without inner sleeve according to claim 1, 2 or 3, characterized in that, an annular stop step is provided on the outer periphery of the rear sleeve, and the rear end of the front sleeve is in contact with the annular stop. Table stop fit. 8. The assembly method without inner sleeve wire spring hole is characterized in that, comprises the following steps: First, use the transition mandrel to send the wire spring wire into the front sheath, and after the wire spring wire is in place, the front end of the wire spring wire is fixedly connected with the front end of the front sheath; 2. Pull out the transition mandrel from the front sheath; 3. Insert and assemble the rear end sleeve and the front sheath, and insert the wire spring wires into the limit grooves of the rear end sleeve in a one-to-one correspondence. and all extend in the front-rear direction; Fourth, the rear sleeve or the front sheath is rotated around its own axis, so that the front and rear ends of the wire spring wire are circumferentially displaced to form a hyperboloid structure; Fifth, assemble the rear end sleeve, the wire spring wire and the front sheath together. 9 . The assembling method without inner sleeve wire spring hole according to claim 8 , wherein in step 5, the rear sleeve, the wire spring wire, and the front sheath are radially crimped after the termination. 10 . Fixed assembly. 10 . The assembling method without inner sleeve wire spring hole according to claim 9 , wherein, in step 1, the front end of the wire spring wire is fixedly connected to the front end of the front sheath by welding. 11 .

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